On the augmented matrix A below, perform all three row operations in the order given, ((a) followed by (b) followed by (c)) and then write the resulting augmented matrix. (a)r2r2-2r1 (b)r3r3 + 3r1 (c)r3r3 + 3r2 A = -2 2 -3 -3 3 -6 5 3 6 -6

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